Eu tenho o seguinte arquivo JNLP:

<jnlp spec="1.0+" codebase="http://****:****" href="tcm2012.jnlp">
  <information>
    <title>TCM 2012</title>
    <vendor>Drift og Performance, *** Servicecenter</vendor>
    <homepage href="http://******"/>
    <description/>
  </information>
  <security>
    <all-permissions/>
  </security>
  <resources>
    <j2se version="1.6+"/>
    <jar href="tcm2012.jar"/>
  </resources>
  <application-desc main-class="com.****.kundeservice.TCMApplication"/>
</jnlp>

Agora, quando eu tento executar a partir da web, recebo o seguinte erro:

Found unsigned entry in resource

Com a seguinte exepction

com.sun.deploy.net.JARSigningException: Found unsigned entry in resource: http://*****:****/tcm2012.jar
at com.sun.javaws.security.SigningInfo.getCommonCodeSignersForJar(Unknown Source)
at com.sun.javaws.security.SigningInfo.check(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResourcesHelper(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResources(Unknown Source)
at com.sun.javaws.Launcher.prepareResources(Unknown Source)
at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main.access$000(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Alguém sabe como resolver esse problema?